Zadanie 4a
Wzorowane na: Chemistry HL Paper 2, May 2026, TZ3, pytanie 4(a). Treść, dane i kontekst są zmienione; sprawdzane umiejętności, format i punktacja jak w oryginale.
Darmowe konto pozwoli wrócić do niego później.
Informacja do zadań 4a-4f.
Organic compounds are made from many different starting materials and by a variety of reactions, and some of them are used as fuels.
Polecenie
Reactions of halogenoalkanes with hydroxide ions are an example of nucleophilic substitution.
(i) Sketch the mechanism for the reaction of 1-chloropropane with aqueous potassium hydroxide. Use curly arrows to show the movement of electrons.
(ii) State the name of the organic product in part (i).
Sprawdź rozwiązanieUkryj rozwiązanieKlucz CKE i punktacja
Odpowiedź z klucza
(i) «SN2, one step»
curly arrow from the lone pair / negative charge on O of HO− to the carbon atom bonded to Cl ✔
curly arrow from the C–Cl bond to Cl ✔
transition state with the negative charge AND partial bonds «HO···C···Cl» ✔
(ii) propan-1-ol ✔
Schemat punktowania
(i) [1] each. Award [2 max] for a correctly drawn SN1 mechanism. Accept curly arrows drawn in the transition state for M2; do not penalize angles other than 180° or a missing bracket in M3; penalize missing charges or wrong connectivity (HO to C drawn with the O–H bond broken, or HO···Cl) only once. (ii) [1]; accept 1-propanol; do not accept a structural formula.